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What’s MXFP4? The 4-Bit Secret Powering OpenAI’s GPT‑OSS Models on Modest Hardware

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A Blog post by Rakshit Aralimatti on Hugging Face

What’s MXFP4? The 4-Bit Secret Powering OpenAI’s GPT‑OSS Models on Modest Hardware Back to Articles a]:hidden"> What’s MXFP4? The 4-Bit Secret Powering OpenAI’s GPT‑OSS Models on Modest Hardware Community Article Published August 8, 2025 Upvote 36 +30 Rakshit Aralimatti RakshitAralimatti Follow With native MXFP4 precision, GPT‑OSS‑120B runs on a single H100 GPU and GPT‑OSS‑20B fits within just 16 GB of memory. What is MXFP4? The Definition and Its Origin Story MXFP4 stands for Microscaling FP4, a next-generation 4-bit floating-point format created and standardized in early 2024 by the Open Com

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